Update doc: not refering to a fixed python version

documentation/source/Introduction/pages/installation.rst

@@ -3,9 +3,11 @@ Installing NuRadioMC / NuRadioReco
 
 Requirements
 ------------
-In order to use ``NuRadioMC`` / ``NuRadioReco``, please ensure you are using a version of Python ``>=3.6``, and a UNIX operating system (linux or MacOS).
+In order to use ``NuRadioMC`` / ``NuRadioReco``, please ensure you are using a `supported <https://devguide.python.org/versions/>`_ version of Python [#]_, and a UNIX operating system (linux or MacOS).
 If you are using Windows, consider installing the `Windows Subsystem for Linux <https://docs.microsoft.com/en-us/windows/wsl/install>`_.
 
+.. [#] We are doing our best effort to maintain compatibility across several python versions. However, issues might escape our radar. Please notify us on slack if you think there is an issue.
+
 Installation using Pip
 -------------------------
 As of version ``2.0.0``, ``NuRadioReco`` is now a subpackage of ``NuRadioMC``. Both ``NuRadioMC`` and ``NuRadioReco`` can therefore be installed
@@ -16,26 +18,26 @@ using ``pip``:
       pip install NuRadioMC
 
 NuRadioMC/NuRadioReco will then be available from Python using ``import NuRadioMC`` and ``import NuRadioReco``, respectively.
-The pip installation will also install all core dependencies. 
+The pip installation will also install all core dependencies.
 
 .. Important::
 
-  Some optional dependencies cannot be installed using pip and 
+  Some optional dependencies cannot be installed using pip and
   :ref:`have to be installed manually <Introduction/pages/installation:Not pip-installable packages>`.
 
 .. Note:: If you want the current version or you want to contribute to NuRadioReco, you need to install it manually.
 
 Development version
 ---------------------------
-The most recent version of ``NuRadioMC`` is available on `github <github.com>`_. 
+The most recent version of ``NuRadioMC`` is available on `github <github.com>`_.
 It can be downloaded manually from the `repository website <https://github.com/nu-radio/NuRadioMC.git>`_,
 or cloned using ``git``
 
 .. code-block:: Bash
 
   git clone https://github.com/nu-radio/NuRadioMC.git
 
-If you don't already have it installed, you should `install Git <https://git-scm.com/>`_. 
+If you don't already have it installed, you should `install Git <https://git-scm.com/>`_.
 To set up NuRadioMC and install the required dependencies, navigate to the ``NuRadioMC`` folder and run the python installer provided:
 
 .. code-block:: bash
@@ -44,13 +46,13 @@ To set up NuRadioMC and install the required dependencies, navigate to the ``NuR
   python3 install_dev.py
 
 This will launch an interactive installer that allows you to install all core and some optional dependencies, as well as setting up some git settings
-in case you want to contribute to NuRadioMC. **We highly recommend installing NuRadioMC inside a** `virtual environment <https://docs.python.org/3/tutorial/venv.html>`_. 
+in case you want to contribute to NuRadioMC. **We highly recommend installing NuRadioMC inside a** `virtual environment <https://docs.python.org/3/tutorial/venv.html>`_.
 You can either use ``python3 -m venv name_of_venv``
-or use a virtual environment manager like `conda <https://anaconda.org/anaconda/python>`_. 
-If you for some reason do not want to use a virtual environment, you can install the dependencies for the current user only by appending 
+or use a virtual environment manager like `conda <https://anaconda.org/anaconda/python>`_.
+If you for some reason do not want to use a virtual environment, you can install the dependencies for the current user only by appending
 ``python3 install_dev.py --user``.
 
-If the installer above does not work, or you want/need to install additional dependencies, 
+If the installer above does not work, or you want/need to install additional dependencies,
 please follow the :ref:`manual installation instructions <Introduction/pages/installation:Manual installation>` below.
 
 PYTHONPATH
@@ -76,17 +78,17 @@ To install all (optional and non-optional) dependencies available in pip at once
 
   pip install numpy scipy matplotlib astropy tinydb tinydb-serialization aenum h5py mysql-python pymongo dash plotly toml peakutils
 
-Note that some optional dependencies are not pip-installable and need to be 
+Note that some optional dependencies are not pip-installable and need to be
 :ref:`installed manually <Introduction/pages/installation:Not pip-installable packages>`
 
 Core Dependencies
 ^^^^^^^^^^^^^^^^^
 - toml:
-  
+
   .. code-block:: bash
 
     pip install toml
-    
+
 - radiotools:
 
   .. code-block:: bash
@@ -196,7 +198,7 @@ These packages are recommended to be able to use all of NuRadioMC/NuRadioReco's
   - conda cannot be used on all systems (eg. on Mac), in that case use a python venv, see details `here <https://github.com/tudo-astroparticlephysics/PROPOSAL/issues/209>`__
 
   - if the linux kernel is too old (eg. on some computing clusters), refer to `this step-by-step guide <https://github.com/tudo-astroparticlephysics/PROPOSAL/wiki/Installing-PROPOSAL-on-a-Linux-kernel---4.11>`_
-  
+
 
 - To use the channelGalacticNoiseAdder, you need the `PyGDSM <https://github.com/telegraphic/pygdsm>`_ package.
 
@@ -207,8 +209,8 @@ These packages are recommended to be able to use all of NuRadioMC/NuRadioReco's
 Not pip-installable packages
 ____________________________
 
-- To speed up the :mod:`analytic ray tracing module <NuRadioMC.SignalProp.analyticraytracing>`, `GSL <https://www.gnu.org/software/gsl/>`_ needs 
-  to be installed, and ``$GSL_DIR`` should point at the correct installation folder. On Linux, GSL can be installed using 
+- To speed up the :mod:`analytic ray tracing module <NuRadioMC.SignalProp.analyticraytracing>`, `GSL <https://www.gnu.org/software/gsl/>`_ needs
+  to be installed, and ``$GSL_DIR`` should point at the correct installation folder. On Linux, GSL can be installed using
 
   .. code-block:: bash